Blindstitch sewing-machine.



L. ONDBRDO-NK.

BLINDSTITGH SEWING MACHINE.

APPLICATION FILED D120. 31, 1901.

Patented Dec. 1, 1914.

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APPLICATION FILED 1320.31, 1901.

1,1 1 9,1 10. Patented Dec. 1,1914.

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'L. ONDERDONK. BLINDSTITCH SEWING MACHINE. APPLICATION FILED DEG. 31',1901.

1,1 1 9, 1 10. Patented Decwl, 1914.

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17 SHEETS-SHEET 4 L. ONDERDONK.

BLINDSTITGH SEWING MACHINE.

APPLICATION FILED mg. 31, 1901.

Patented Dec. 1, 1914.

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BLINDSTITUH SEWING MACHINE.

APPLIOATION FILED DEO.31,1901

1,1 1 9, 1 10, Patented Dec. 1,1914.

17 SHEETS-SHEET 6.

L. ONDERDONK.

BLINDSTITGH SEWING MACHINE.

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L. ONDERDONK.

BLINDSTITCH SEWING MACHINE.

APPLICATION FILED DEC. 31, 1901'.

Patented Dec. 1, 1914.

17 SHEETS SHEET 9,

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BLINDSTITCH SEWING MACHINE APPLICATION FILED DEO.31, 1901.

1,1 1 9, 1 10. Patented Dec. 1,1914.

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BLINDSTITOH SEWING MACHINE.

APPLICATION FILED DBC.31,1901.

1,1 19,1 10. Patented Dec. 1,1914.

17 SHEETSSHEET 11.

Q Vi 114mm as 1 W k 4w L. ONDERDONK.

BLINDSTITCH SEWING MACHINE.

APPLICATION FILED DEC. 31, 1901 1,1 19,1 10. Patented Dec. 1,1914.

17 SHEETS SHEET 12.

L: ONDERDONK.

BLINDSTITGH SEWING MACHINE.

APPLICATION FILED DEC. 31, 1901 1,1 19,1 10, Patented Dec.1,1914n 17SHEETSSHEET 13.

L. ONDERDONK.

BLINDSTITCH SEWING MACHINE.

APPLIOATION FILED DEU.31,1901.

1,119,110. Patented Dec.1,1914.

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BLINDSTITCH SEWING MACHINE.

APPLICATION FILED DEC. 31, 1901 Patented Dec. 1, 1914.

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L. ONDERDONK.

BLINDSTITCH SEWING MACHINE.

APPLICATION FILED DEO.31,1901.

1,1 19,1 10. Patented 1180121914.

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L. ONDERDONK. BLINDSTITCH SEWING MACHINE.

APPLICATION FILED 11110 31, 1901. 1,1 1 9,1 10, Patented Dec. 1,1914. 11SHEETSSHEET 17.

I gnvc'mbo l Vifncaqcs g A S l l 2 UNITED STATES PATENT oEEioE.

LANSING ONDERDONK, OF NEW YORK, N. Y.', ASSIGNOR TO UNION SPECIALMACHINE. COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

BLINDSTITCH SEWING MACHINE.

Specification of Letters Patent.

Patented Dec. 1,1914.

Application filed December 31, 1901. Serial No. 87,959.

lowing is a description, reference being had i to the accompanyingdrawing, and to the letters and figures of reference marked thereon.

My invention relates to an improvement in sewing machines, andparticularly to a machine for blindstitchii'ig, the object being toprovide a machine which shall be capable of use upon various kinds ofwork and on various styles of goods, and will be useful in sewing in hatsweats, sewing trousers bottoms, knit goods such as the tops ofstockings, and other'work of this class where the market demands a blindstitch, and which shall also be capable of use for other kinds of work,as, for eXample,'-in uniting the edges of two abutting pieces of fabricfor making an overseamstitch for binding the edges of fabrics; and, ingeneral, to produce a machine capable of great speed and durabilityand'which, considering the uses to which it can be applied, shall becomparatively simple in construction.

Cert'ain features embodied in the machine which forms the subject matterof this application and of other co-pen'ding-applica- 'tions uponsegregable features, -may be useful on other machines than those of thisparticular type, and, therefore, it will be understood that the claims,in so far as they are applicable to other machines are not limited tothis particular type.

The machine as a whole comprises various features, certain of which, asfor example, the looper operating mechanism; the work support operatingmechanism: the feed mechanism; and a coinplemental top feed mechanism;form the subjects matter of other applications and are'therein claimedper so, being herein claimed in combination with the features which makethem especially applicable to this type, and in so far as they formcombinations and sub-combinations of the general invention.

The invention consists in the matters hereinafter described and referredto in the appended claims.

The invention is illustrated inthe accompanying drawings, in whichiFigure 1 is a front elevation of a blind stitch sewing machine embod "ngmy invention, this figure representing the, preferred form; Fig. 1 is asimilar view representing certain modifications in the construction andoperation, particularly, of the.

looper operating mechanism, the top feed and various other. features'bein omitted therefrom; Fig-.2 is a rear elevation of the preferredform of my machine; Fig. 2 is a rear view of the machine shown in Fig.-1*; Fig. 2 is a detail view showing the position of certain of the partsin Fig. 2 when the cylinder is lowered; Fig. 3 is an end view of Fig. 1;Fig. 3 is an end View of Fig. 1: Fig.4 is a rear sectional end view ofthe machine shown in Fig. 1; Fig. 5 is a sectional side view, brokenaway throu h the center of the work support, both 0 these figuresillustrating principally the feed operating mechanism, itv being.understood, however, .that these figures, so far as the work supportoperating mechanism shown in the lower nepk and overhanging arm removedand showing the work support operating mechanism in section; Fig. 9 IS aperspective view of the top feed mechanism detached; Fig.

10 is a vertical section taken through the forward end of Fig. 9; Fig.10 is a detail perspective view of the feed dog and its immediateoperating parts present in the machine shown in Fig. 1; Figs. 11 and 12.are end views of the work supportQand top feed dogs in differentpositions; Fig. 13 represents a cross section of a seam sewed on mymachine; Fig. 111's :1 view similar to Fig. 9, showing the parts in aslightly different position; Fig. 15 represents a view in perspective ofthe preferred form of looperopcrating mechanism with its connectionsdetached from the rest of the machine; Figs. 16 and 17 represent thelooper and needle relatively at their two extremes of movement;.Figs. 18and 19 are respectively front and rear views in detail of the modifiedform of looper operating mechanism present in the machine shown in Fig.1; Fig. 20 is a section showing the bearing for the looper supportingrod; Figs. 21, 22, and 23," represent in detail the presser foot and thelooper and needle in different positions; Fig. 24 is a sectional sidedetail view of the top feed tripping mechanism Fig. 25 is a face view ofthe same; Fig. 26 is a detail view of the catch or stop to prevent thelowering of the work support when the needle is in the goods; Figs. 27and 28 are respectively side and end views; F igs. 29 and 30 are similarviews, showing the needle and looper of the machine represented in Fig.1 in different positions; Figs. 31 to 36 represent in detail the mannerof forming the stitch with the machine shown in Fig. 1*; Figs. 37, 38,and 39 are respectively front, rear, and sectional views of my specialform of looper; Fig. 40 is a detail view of one of the presser feet;Fig, 41 is a detail view showing modifications of the presser foot bars,and the yoke connecting the same, upon which the spring bears to holdthem down; Fig. 42 is a front perspective view of the machine shown inFig. 1, illustrating the presser bars and presser feet; Fig. 42* is anenlarged plan view of the two presser feet; Fig. 43 is a front, sideelevation illustrating a modified form of mechanism for operatingthelooper; and Fig. 1-1 is a detail view of the fulcrum rod for the looperoperating pitman.

In these drawings, is the standard of a blind stitch sewing machine; B,the overhanging arm orygoose-neck; and C, the work supporting plate,herein shown as a cylindrical casing inclosing the feeding mecha nismand provided with a throat plate D, having openings for the passage ofthe feed dogs, and provided with a V-shaped central rim or projection E,over which the goods are crimped. The needle F is herein shown as curvedand reciprocates backand forth across the line of feed through the goodscrimped over the throat plate, taking a bite therein. The shank of thisneedle is secured in the lower end of a swinging lever G, which ispivoted to a stud H secured to the machine frame. The upper end of thisneedle lever, as shown at I, is pivoted by a pivot pin K between theforks L on the head M secured to the pitman rod N. This pitman rod atits opposite end is connected to a strap 0, which embraces the eccentricP on the transverse driving shaft Q. As the driving shaft revolves,therefore, the needle reciprocates in the-arc of a circle back and forthacross the line of the feed. To prevent deflection of the needle in itsmovement in case very thick or tough goods are to be The preferred formof looper. operating I mechanism is shown in Figs. 1, 2, and 15, and maybe briefly described as follows: To the rear side of the belt wheel R isattached the crank pin S, upon which is pivoted one end of the pitmanrod 2, which I at its opposite end embraces a ball stud 4 upon the crank5 fixed to the rock shaft 6,- journaled in the bearing barrel 7 on thehead of the machine. Upon the opposite side of this bearing barrel andupon the rock shaft is fixed another crank 9, to which is pivotallysecured a forked pin or bolt 10. Between the forks of this pin or bolt10 is pivotally secured the upper end of the looper supporting rod 11,which may be in 'one piece, or which, as herein shown, comprises theupper part 12 pivoted between the forks and the lower part 13, screwedinto a socket in the upper. part. The shank of the looper 14, is securedin a collar or clamp 15 on the lower end of the rod 13. This rod 13,through the action of the cranks 5 and 9 is raised and lowered to impartto the looper a rise and fall, to enable it to pass from one side theline of the seam to the other over the apex o'r ridge on the throatplate, and to enable it to escape obstructions such as seams or extrathicknesses of goods; but to impart this sidewise movement from one sidethe line of the seam to the other, it is looper supporting rod, in orderthat as it rises and falls and the cranks pass from one side the centerto the other, the tilting movement may be imparted; and to this end, Ihave provided the arm 16, enlarged at its outer end and formed with arecess through which the rod 13 passes, this recess being formed toreceive and hold a ball bearing 17. In the rise and fall, therefore, ofsaid looper supporting rod it slides through the ball 17, and at thesame time oscillates said ball in its support, whereby the looper hasthe four motions above referred to. It is also necessary to imparttosaid looper a forward and backward movement in the direction of itslength, to enable it to take and leave the needle loop, and also tocarry its own loop into position tobe engaged by the needle, and to thisend the arm 16 at its upper end is fixed upon an upright rock shaft 18,journaled in bearing lugs 19. and 20, on the machine frame. The upperend of this rock shaft 18 has clamped about it one end of a roll or bar21, which at its opposite end has a ball and pitman connection 23, withan eccentric 2-l, upon the main shaft. As the shaft revolves, there-- 5from front to -rear of the machine, thus impartingitothe looper abackwardand forward movement .in the direction of its length.

Referring to IEigs. 11*, 2, 18, 19, and 20, a slightliy modifiedconstruction of looper OPGIBMDg mechanism is shown. In this arrangement,the pitman 23 extends at quite an inclination to the frame,and at itsouter endiisattacheditoalhead d, which is pivoted to the arm 21, whichextends from the sleeve 18' an'ranged upon the inclined stud 18*. Thissleeve has another extending arm 16, which carries upon its outer end aclamp inghead e, which incloses the ball 18'. The

39. This looper has a recess on its under side, as shown at 25, thereatshoulder of 35'this recess forming a projection 26, which,

in the movement-of the looper engages the thread and holds it inposition, so that the needle will pass between the under side of thelooper and the looper thread. In other words, the looper carries on itsunder side, a spreading device for its own loop, which spreading deviceacts as shown in Figs. 31. to 36, of the drawings, Fig. 31 showing thelooper just entering the needle loop; F ig. 32 the looper about one-halfway over to the other sideof the seam, with the looper thread under thelooper. Fig. 33 shows the looper in position preparatory to moving backbefore the needle engages the looper thread, the said looper threadhaving been engaged by the projection upon the under side of saidlooper. In Fig. 34:, the looper is shown as having moved back from theposition shown in .Fig. 33, with the point of the needle just passingunder the looper, preparatory to engaging the looper thread. Fig. 35illustrates a cross section of the looper, the point being cut away,lntt the looper thread shown in full lines; 111 this drawing, the pointof the needle having engaged the looper thread and the looperthread'being brought into position by the projection on the under sideof the looper. Fig. 36 represents the looper passing back over thegoods, back of the path of the looper supporting rod 13, passes throughneedle to position: arato to a ain entering .the needle lo a g Dy I will'nowdesca'ibe' the means for operating the cylindrical work support, ofwhich two diflerent forms are shown, and will refer particularly to thepreferred forms which are illustrated in Figs. 1, 6, "c, and 8. Thecylindrical work support is hinged at its rear end to the-standard A, bymeans of the rock shaft D. E is a hand lever secured to the shaft Epassing through the base or standard of the machine, said hand leverswinging close to the front side thereof. Fixed to the shaft E andadjacent the inside face of the standard ofthe machine is an arm orlever piece 27, to which is pivotall-y secured by a shoulder screw, thelink 29, which link at its opposite end is pivotally secured by thescrew 30 to the arm or lever 31, loosely sleeved on the shaft 32:journaled in the machine standard. The arm or lever 31 is provided withan upwardly projecting lug or arm 33, which engages the lower end of thelatch 34, which is loosel sleeved on said shaft 32, and is provide withan extension 35, which the lug .or arm 33 is adapted :to engage when theshaft is rocked 'm one direction.

Upon the shaft 32 within'the standard, near the opposite side thereoffrom the arm 31, is a similar armlor lever 36 fixed to said shaft, andhaving an upwardly projecting arm or zlngl3i7, adapted to engage theextension 38 on ithe latch 34. Freely secured to the shaft 32 on theoutside of the standard is a square headed collar piece 39, on thesquare head of which is securely fastened the lifting lever 40, intendedto be connected with a foot treadle or knee lever under the machinetable by any suitable means.

D is an extension of the cylinder or Work support which passes downinside the machine standard. 42 is a bracket, secured inside thestandard, and provided with a barrel 43, in which is located a plunger44, free to slide endwise .in its bearings. The inner end of the plunger44 is normally forced against the part D by a spiral spring 45, thepressure of which is regulated by a thumb screw 46. The action of thespring and plunger against the extension D keeps the work support inplace against the work or presser foot, or against the screw A whichregulates the position of the work support and consequently the amountof bite of the needle into the goods. When the hand lever E is up, theaction of the spring 45 and plunger 44 causes the work support to restagainst the stop A Now by moving the lever E down, the shaft E willrock, and the lever 31, through the mediumof the connecting link 29, andthe extension 33,

- will engage the part 34 and swing back the lower end of D thuslowering the Work

